Area Code 618-660 located in CASEYVILLE, SAINT CLAIR, IL, more detail is as below. Place NPA (Numbering Plan Area) : 618 NXX (Local Number Prefix) : 660 City : CASEYVILLE County : SAINT CLAIR State : IL (Illinois) NXX Use Type : Wireless NXX Intro Version : 1994-09-11 FIPS (Federal Information Processing Standards) : 17163 LATA (Local Access Transport Area) : 520 Rate Center : COLLINSVL ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 62232 Other Information NPANXX : 618660 Switch CLLI (Common Language Location Identifier) : NWTPMOABCM6 MSA CBSA (Core Based Statistical Area) : St. Louis, MO-IL MSA CBSA Code (Core Based Statistical Area) : 41180 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : NEW CINGULAR WIRELESS PCS, LLC - IL OCN (Operating Company Number) : 6534 Coverage Area Name : COLLINSVILLE Latitude : 38.6787 Longitude : -89.9831 ‹ previous : 618-660 next › : 618-661 Telephone Number List 618-660-0000 ~ 618-660-9999